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10 - 5
10 I/O Refreshing
NX-series EtherCAT Coupler Unit User’s Manual (W519)
10-2 I/O Re
freshin
g for Eth
er-
CA
T
Slaves
10
1
0-2-2
I/O R
efreshing Mode Opera
tion
Free-run slave #1 in the figure labeled
Example of I/O Refreshing Mode Operation
ates in Free-Run Mode.
This slave performs I/O processing based on its own unique timing ((C) and (D) in the figure), indepen-
dent of Sync0.
An example of operation in each I/O refreshing mode is provided in the following figure.
Free-Run Mode Operation
Example of I/O Refreshing Mode Operation
Primary periodic task
Primary periodic task
Primary periodic task
Sync0
Sync0
(D)
(C)
Input delay and
AD conversion time
Output delay and
DA conversion time
Sync0
(B)
EtherCAT
Master Function
Module
PLC
Function
Module
EtherCAT
communications
path
Synced
slave #1
Free-run
slave #1
Synced
slave #2
Primary period
(example: 500
μ
s)
Primary period
(example: 500
μ
s)
Primary period
(example: 500
μ
s)
Process data communications
cycle (example: 500
μ
s)
Process data communica-
tions cycle (example: 500
μ
s)
Process data communica-
tions cycle (example: 500
μ
s)
Period of Sync0
(example: 500
μ
s)
Period of Sync0
(example: 500
μ
s)
Period of Sync0
(example: 500
μ
s)
EtherCAT transmission
time
EtherCAT transmission
time
EtherCAT transmission
time
Processing for free-run slave #1
Processing for free-run slave #1
(A)
CPU Unit
EtherCAT slaves
Summary of Contents for NX-ECC201
Page 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Page 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Page 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Page 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Page 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Page 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Page 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Page 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Page 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Page 405: ......